todinlaw

I have two pictures below. My left front and Rear.
The left front, you are looking at it as if you were standing at the front of the car looking back. You will note that the middle rib is warn down on the outside edge as if someone ground it off. this is a 235/35/19 Corsa from my GT3, they recommend 30 hot I run it about 33 hot. People have told me two different theories as to why the middle rib wear is uneven and taking off one side. Over inflation making the middle stick up more, but my question why is in not even across the rib, it just taking off one side of it.
Under inflation, the tire is bucketing or folding making the middle rib stick out and wear it down. It is only on the right front.

Second picture is one of my rear tires, both have just started to develop these crack in the middle tread, that is a first runs hot at about 34 to 35.

Whats your opinion on the front overinflated or Under on the front tire?

on the rear tire I am talking about the 3 splits just above the middle of the picture above the rain channel.

Streak

The middle rib wear looks pretty normal for a front tire on a tracked car. (assuming from your avatar) Do you have the factory alignment? It is set for mild understeer. High speed turns will cause that kind of wear particularly with a stock set up.

The cuts? I dunno. It may explode. Better just give me the car

RJay

Likely you need a camber and toe adjustment.

RJFabCab

It looks like you have Direzionales in front and Asimmetricos in back.

The wear pattern of the middle band of the front tire doesn't surprise me. MPSCs wear the same way... each band of the tire is more worn on the outside edge even with a proper track alignment.

You may be able to get better wear across the fronts with some alignment tweaks (the outside edge thin lines are disappearing in the front tire pic). With your current specs, you may not have much more room to play with pressures since you're already working the edge of the tire. Perhaps more neg camber will provide more even wear and allow you to drop the pressures a bit, too.

IIRC, the Corsas have rows of thin lines molded into them, and in the pic of the rear tire, the thin lines showing up in segments aren't in the original mold. That rear tire IMO will be prone to chunking soon.

You may want to contact Pirelli or your distributor to see if you can get the tires replaced on their dime.

earlyapex

Shave your tires.

todinlaw

The alignment is the track set up recommended in the manual toe 0 front camber -2.1 rear -2.5, I am just wondering if the middle rib is wearing on an angle why not more wear on the outer shoulder on the left front, I would think that it would be punished to. Maybe the camber is helping that. I have experimented with tire pressure more and less and can't seam to figure out what will help it.

todinlaw

I will take my chances and keep the car.

Streak

Don't be a fool! Something is very wrong with that car! Get rid of it!

Veloce Raptor

Frank, is this wear from Mid-Ohio, or another track?

FTS

I would suspect that there is too much toe in on that side, or at least have the toe alignment checked by another shop using a different alignment machine.

Papamurphdog

re the rear tire; check the fenderwell as it may be a cut, while the suspension is loaded, otherwise not sure... could have been debris...

John H

Frank

Next time you need an alignment, go to Bill Brauksick in Cincinnati. I think his shop is called Performance Alignment. Audi has flown him to LeMans. As far as I am concerned, he is the alignment/corner balance/ride height king.

AudiOn19s

My old tires had a similar tread design and always wore the center rib like yours tires did...even with adequate negative camber. (and even too much negative camber at times when I was on streets). I wouldn't worry about it.

I also can't believe those still have that much tread on them!

Andy

analogmike

Too much tread for a track tire, get something else or shave them as per above post.

Potomac-Greg

Looks like my RA1s after a few days at a right-turn track (Summit Point). Most of the tread blocks show a camber from the stressed edge rising up to the unstressed edge.